Method and device in communication node used for wireless communication

Abstract

The disclosure provides a method and device in communication node for wireless communications. The communication node receives first information and second information, transmits a first signaling, and transmits a first signal; the first information is used for determining first power, the second information is used for determining a reference pathloss; wherein the first signaling is used for indicating a target distance and time-frequency resources occupied by the first signal; the reference pathloss corresponds to a reference distance, the reference distance being greater than 0; a ratio between the target distance and the reference distance as well as the reference pathloss are used together for determining a target pathloss; the target pathloss is used for determining second power, and a smaller value between the first power and the second power is used for determining transmitting power of the first signal. The present disclosure can effectively support power control for Groupcast.

What is claimed is: 
     
       1. A first communication node for wireless communications, comprising:
 a first receiver, receiving first information and second information, the first information being used for determining first power, the second information being used for determining a reference pathloss; 
 a first transmitter, transmitting a first signaling; and 
 a second transmitter, transmitting a first signal; 
 wherein the first signaling is used for indicating a target distance and time-frequency resources occupied by the first signal; the reference pathloss corresponds to a reference distance, the reference distance being greater than 0; a ratio between the target distance and the reference distance as well as the reference pathloss are used together for determining a target pathloss; the target pathloss is used for determining second power, and a smaller value between the first power and the second power is used for determining transmitting power of the first signal. 
 
     
     
       2. The first communication node according to  claim 1 , wherein the first receiver receives third information; herein, the third information is used for determining a target pathloss factor, a unit of the target pathloss and a unit of the reference pathloss are both dB; for a given ratio between the target distance and the reference distance, a difference value between the target pathloss and the reference pathloss is linearly related to the target pathloss factor. 
     
     
       3. The first communication node according to  claim 1 , wherein the reference pathloss and the reference distance belong to a reference candidate combination, the reference candidate combination being one of X candidate combinations, and the second information is used for determining the reference candidate combination out of the X candidate combinations; any of the X candidate combinations comprises a pathloss and a distance, the X being a positive integer greater than 1. 
     
     
       4. The first communication node according to  claim 1 , wherein the second information comprises M sub-information-block(s), which is(are) respectively used for determining M pathloss(es), the M sub-information-block(s) being used for determining M zone identification(s) respectively, the M being a positive integer; any of the M zone identification(s) is used for identifying a geographic zone, and a geographic location of the first communication node is used for determining a target zone identification, the target zone identification being one of the M zone identification(s); the reference pathloss is one of the M pathloss(es), and a sub-information-block among the M sub-information-block(s) used for determining the reference pathloss is also used for determining the target zone identification. 
     
     
       5. The first communication node according to  claim 1 , wherein the first receiver performs a first measurement, the first measurement being used for determining a first measurement quantity; herein, the first measurement quantity is used for determining a first pathloss, the first information is used for determining a first parameter, the first pathloss together with the first parameter being used for determining the first power. 
     
     
       6. The first communication node according to  claim 1 , wherein the first receiver receives fourth information; wherein the fourth information is used for determining a second parameter, and the second parameter and the target pathloss are used for determining the second power. 
     
     
       7. The first communication node according to  claim 1 , comprising:
 a second receiver, monitoring a second signal; 
 wherein the second signal is used for determining whether the first signal is correctly received; a first sequence is used for generating the second signal; at least one of time-frequency resources occupied by the first signaling or time-frequency resources occupied by the first signal is used for determining time-frequency resources occupied by the second signal, or at least one of the time-frequency resources occupied by the first signaling or the time-frequency resources occupied by the first signal is used for determining the first sequence, or at least one of the time-frequency resources occupied by the first signaling or the time-frequency resources occupied by the first signal is used for determining time-frequency resources occupied by the second signal and the first sequence. 
 
     
     
       8. The first communication node according to  claim 1 , wherein the first signal comprises a first sub-signal and a second sub-signal, and frequency-domain resources occupied by the first sub-signal are different from frequency-domain resources occupied by the second sub-signal; frequency-domain resources occupied by the second sub-signal comprise frequency-domain resources occupied by the first sub-signal, and time-domain resources occupied by the first sub-signal and time-domain resources occupied by the second sub-signal are orthogonal in time domain; a smaller value between the first power and the second power is used for determining transmitting power of the second sub-signal, and transmitting power of the second sub-signal, a bandwidth of frequency-domain resources occupied by the second sub-signal and a bandwidth of frequency-domain resources occupied by the first sub-signal are used together for determining transmitting power of the first sub-signal. 
     
     
       9. The first communication node according to  claim 1 , wherein the first information indicates M maximum transmitting power for M Chanel Busy Ratio (CBR) range(s), the M being a positive integer; a CBR for the first communication node when transmitting the first signal belongs to a first CBR range, the first CBR range being one of the M CBR range(s), and the first power is equal to one of the M maximum transmitting power corresponding to the first CBR range. 
     
     
       10. A method in a first communication node for wireless communications, comprising:
 receiving first information and second information, the first information being used for determining first power, the second information being used for determining a reference pathloss; 
 transmitting a first signaling; and 
 transmitting a first signal; 
 wherein the first signaling is used for indicating a target distance and time-frequency resources occupied by the first signal; the reference pathloss corresponds to a reference distance, the reference distance being greater than 0; a ratio between the target distance and the reference distance as well as the reference pathloss are used together for determining a target pathloss; the target pathloss is used for determining second power, and a smaller value between the first power and the second power is used for determining transmitting power of the first signal. 
 
     
     
       11. The method according to  claim 10 , comprising:
 receiving third information; 
 wherein, the third information is used for determining a target pathloss factor, a unit of the target pathloss and a unit of the reference pathloss are both dB; for a given ratio between the target distance and the reference distance, a difference value between the target pathloss and the reference pathloss is linearly related to the target pathloss factor. 
 
     
     
       12. The method according to  claim 10 , wherein the reference pathloss and the reference distance belong to a reference candidate combination, the reference candidate combination being one of X candidate combinations, and the second information is used for determining the reference candidate combination out of the X candidate combinations; any of the X candidate combinations comprises a pathloss and a distance, the X being a positive integer greater than 1. 
     
     
       13. The method according to  claim 10 , wherein the second information comprises M sub-information-block(s), which is(are) respectively used for determining M pathloss(es), the M sub-information-block(s) being used for determining M zone identification(s) respectively, the M being a positive integer; any of the M zone identification(s) is used for identifying a geographic zone, and a geographic location of the first communication node is used for determining a target zone identification, the target zone identification being one of the M zone identification(s); the reference pathloss is one of the M pathloss(es), and a sub-information-block among the M sub-information-block(s) used for determining the reference pathloss is also used for determining the target zone identification. 
     
     
       14. The method according to  claim 10 , comprising:
 performing a first measurement, the first measurement being used for determining a first measurement quantity; 
 wherein, the first measurement quantity is used for determining a first pathloss, the first information is used for determining a first parameter, the first pathloss together with the first parameter being used for determining the first power. 
 
     
     
       15. The method according to  claim 10 , comprising:
 receiving fourth information; 
 wherein the fourth information is used for determining a second parameter, and the second parameter and the target pathloss are used for determining the second power. 
 
     
     
       16. The method according to  claim 10 , comprising:
 monitoring a second signal;
 wherein the second signal is used for determining whether the first signal is correctly received; a first sequence is used for generating the second signal; at least one of time-frequency resources occupied by the first signaling or time-frequency resources occupied by the first signal is used for determining time-frequency resources occupied by the second signal, or at least one of the time-frequency resources occupied by the first signaling or the time-frequency resources occupied by the first signal is used for determining the first sequence, or at least one of the time-frequency resources occupied by the first signaling or the time-frequency resources occupied by the first signal is used for determining time-frequency resources occupied by the second signal and the first sequence. 
 
 
     
     
       17. The method according to  claim 10 , wherein the first signal comprises a first sub-signal and a second sub-signal, and frequency-domain resources occupied by the first sub-signal are different from frequency-domain resources occupied by the second sub-signal; frequency-domain resources occupied by the second sub-signal comprise frequency-domain resources occupied by the first sub-signal, and time-domain resources occupied by the first sub-signal and time-domain resources occupied by the second sub-signal are orthogonal in time domain; a smaller value between the first power and the second power is used for determining transmitting power of the second sub-signal, and transmitting power of the second sub-signal, a bandwidth of frequency-domain resources occupied by the second sub-signal and a bandwidth of frequency-domain resources occupied by the first sub-signal are used together for determining transmitting power of the first sub-signal. 
     
     
       18. The method according to  claim 10 , wherein the first information indicates M maximum transmitting power for M Chanel Busy Ratio (CBR) range(s), the M being a positive integer; a CBR for the first communication node when transmitting the first signal belongs to a first CBR range, the first CBR range being one of the M CBR range(s), and the first power is equal to one of the M maximum transmitting power corresponding to the first CBR range.